Re: [Boost-users] Spirit: parsing tab separated values and no_skip compilation error.

I am a beginner with Spirit. I just read the tutorial and I am playing around with some examples. Environment: boost 1.43, Windows Vista, Code::Blocks, mingw, gcc 4.5.

My goal is to build a tab separated values parser. If you have an example on how to parse something like: string/t/tdouble/tdouble it would be great. Contiguous tabs should be considered as one tab, not an empty field.

To start I just tried to parse a tab separated list of strings but I am having some difficulties.

Is there another skip parser to be used instead of space (for full code see the end of the message below) ? I have changed the commas to tabs in the code below but it failed. I guess it was because it was skipping them (space skipper).

        bool r = phrase_parse(first, last,

            //  Begin grammar             (                 +(char_ - ',') % ','             )             ,             //  End grammar

            space, v);

This code works with commas but it fails with '\t'.

I tried to use no_skip[] but it failed to compile the header #include :

C:\boost_1_43_0\boost\spirit\home\qi\directive\no_skip.hpp|30|error: 'no_skip' is not a member of 'boost::spirit::tag'|

For full error message see the end of the message below.

Any suggestions ?

Thank you for your attention, Mau.

#include #include #include #include #include //#include

#include <iostream> #include <string> #include <vector>

#define VECTOR_TYPE std::string

namespace client {     namespace qi = boost::spirit::qi;     namespace ascii = boost::spirit::ascii;

    ////////////////////////////////////////////////////////////////////// /////     //  Our number list compiler     ////////////////////////////////////////////////////////////////////// /////     //[tutorial_numlist4     template <typename Iterator>     bool parse_numbers(Iterator first, Iterator last, std::vector& v)     {         using qi::double_;         using qi::phrase_parse;         using qi::_1;         using ascii::space;         using qi::char_;

        bool r = phrase_parse(first, last,

            //  Begin grammar             (                 +(char_ - ',') % ','             )             ,             //  End grammar

            space, v);

        if (first != last) // fail if we did not get a full match             return false;         return r;     }     //] }

////////////////////////////////////////////////////////////////////////// // //  Main program ////////////////////////////////////////////////////////////////////////// // int main() {     std::cout << "/////////////////////////////////////////////////////////\n\n";     std::cout << "\t\tA comma separated list parser for Spirit...\n\n";     std::cout << "/////////////////////////////////////////////////////////\n\n";

    std::cout << "Give me a comma separated list of numbers.\n";     std::cout << "The numbers will be inserted in a vector of numbers\n";     std::cout << "Type [q or Q] to quit\n\n";

    std::string str;     while (getline(std::cin, str))     {         if (str.empty() || str[0] == 'q' || str[0] == 'Q')             break;

        std::vector v;         if (client::parse_numbers(str.begin(), str.end(), v))         {             std::cout << "-------------------------\n";             std::cout << "Parsing succeeded\n";             std::cout << str << " Parses OK: " << std::endl;

            for (std::vector::size_type i = 0; i < v.size(); ++i)                 std::cout << i << ": " << v[i] << std::endl;

            std::cout << "\n-------------------------\n";         }         else         {             std::cout << "-------------------------\n";             std::cout << "Parsing failed\n";             std::cout << "-------------------------\n";         }     }

    std::cout << "Bye... :-) \n\n";     return 0; }

This example compiles fine for me (VC10, g++ 4.5). Is it supposed to fail? Regards Hartmut --------------- Meet me at BoostCon www.boostcon.com